Heating-stove



I E. v. couysron. v HEATING STOVE. APPLICATION FILED AUG-8, 19H- Laser/o1.

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E. V. COULSTON.

HEATINGSTOVE. APPLICATION FILED AUG-8| 1917.

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UITED STATES EARL V. COULSTON, OF ROCK ISLAND, ILLINOIS.

HEATING-STOVE.

Specification of Letters Patent.

Patented Feb; 15, 1921.

Application filed August 8, 1917. Serial No. 185,202.

To all whom it may concern:

Be it known that I, EARL'V. COULsrON, a citizen of the United States, resident of Rock Island, county of Rock Island, and State of Illinois, have invented new and useful Improvements in Heating-Stoves, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates to heating stoves and particularly to that class of such devices wherein the process of combustion is the opposite of that usually employed by said devices. Whereas, the usual method of burning fuel in a stove is to locate the fire in the lower zone thereof, furnish fresh fuel on top of said fire and arrange the current of the draft to rise from below so that the distilled gases, smoke and carbon, and other products of combustion, are thrown off from the top of the fuel and often pass up through the flue in the form of heavy smoke,

now 1n my improved stove, hereinafter to be fully described, the fuel burns as if it were fed into the fire from below and there is nothing to choke off said fire or smother the same beyond the point of combustion or interfere with the plentiful supply of oxygen, so that thereby'smokeless combus tion is accomplished.

The annexed drawings and the following description set forth in detail certain means embodying my invention, the disclosed means, however, constituting but one of various mechanical forms in which the principle of the invention may be applied.

In said annexed drawings:

Figure 1 represents a front elevation of a conventionalformof stove provided with my improvements; Fig. 2 represents a vertical section taken in the plane indicated by the lines IIII, Fig. 1; and Figs. 3 and 4 represent horizontal sections taken in the planes represented by the lines III-III and IV-IV, respectively, Fig. 2.

In said annexed drawings a suitable body 1, a top 2, an outlet 3 for gases, smoke and other products of combustion, a fire pot 4, a grate 5 and the usual ash pit 6 are provided, as in any conventional stove. I provide a front plate 7 to which is secured a fuel door 8 which may be formed with a damper 9. A lower damper 10 is also provided. Disposed within the fire pot t is an element 11 provided with twoopen ends, one of which open ends is disposed adjacent to the fuel door 8, as plainly shown in Fig. 2. The other open end of said element 11 is disposed just above the center of the fire pot 4. This element 11 is provided with a lower flange 12 upon and below which are supported tWo -members 13' and lt providing between them a laterally inclosed passage 16, said member 14 being formed with a plurality of lower slots 20, as plainly shown in Fig. 2. The flange 12 does not entirely encircle the element 11 but is cut away, as is plainly shown in Fig. 3, said cut away portion being disposed adjacently to the front of the stove. 18 is disposed between the element 11 and the front of the stove and incloses the'whole space therebetween with the exception of that comprehended by the damper 10 and the space formed by the cutting away of part of the flange 12, so that a passage 19 is provided from the damper 10 down into the space 16 between the members 13 and 1e and out through the slots 20 into the lower outer zone of the fire pot. 'This is a fresh air passage and oxygen is thereby distributed to every portion of'thelower outer zone of the fire pot, this distribution being effected into an annular space 17 .disposed adjacently to the inner wall of the body portion of the stove, as plainly shown in Fig. 2. V

I The space 17 thus provided. is disposed between the extreme outer zone of the fire pot and the member '14, which spacepro-' vides a passage for products oficombustion to the smoke outlet 3.

The operation of theabove described device is as follows: A fire is started on the grate in the manner common to any stove. the paper, kindling, etc, being inserted through the door 8. Then additional fuel is poured in through said door 8 and through the element 11 whence it falls on the fire already started on the grate and piles up within the mouth of the member 13 and the element 11. The register 10 opened and fresh air is admitted which passes down as above described and becomes heated in its passage and drawn by the action of the chimney draft forcibly into the gases which are generated from the fuel while on the fire below. The burning is in a substantially annular flame and impinges against the outer wall of the fire pot and travels A further element a given amount of heat.

up around the body of the stove so that the entire surface of the same is heated. In this method of combustion the gases and available combustible parts of the fuel are slowly distilled and when they arrive at the point of combustion toward the outer part of the fire pot, they are immediately mixed with a plentiful supply of heated fresh air so that the combustion is complete and perfect, whereby a great saving is made 7 in the amount of fuel necessary to provide Furthermore, this V-device permits the burning of a very low grade bituminous coal because of the aboveii described process of slow distillation of the fjvolatile combustible parts of the fuel and the subsequent mixture of fresh air at the point of combustion. I

The element 11 is shown in the drawings as being of tubular form but it could be of any shape, square orrectangular or irregular, and also the members 13 and 14-, while 7 shown as annular in shape, could be ellipti .cal or any irregular shape, the necessary features being only that the'element 1.1 be fas "tened tightly to the front and present no opening to the smoke outlet other than the open'end at theibottom and that the memhere, 13 and 14 be disposed adjacently to 3O 7 ceive fresh air' and distribute it to every" this bottom open endiand arranged to reportionof the fire pot adjacent to the wall of the body 1. The movement of the hot I gases may be accelerated by opening the draft 9"provided in the door 8 which will force. the gases into theouter combustion zone at a more rapid rate, but the stove in,

r 'practiceworks satisfactorily with. this dam- I v ,per'closed all the time;

What I claim is:

31. In a heating stove," the combination of-a body member-lnoluding a suitable fire potand a smoke outlet; means forming a fuel chamber extending to the front of said body 'member and provided with a fuel door; members supported by said chamber forming an airringibelow the sameyand means 7 providing afresh air chamber above the air ring, said chamber communicating with ithe opening into said"passage atmosphere,"communication being provided between said air chamber and said air ring, said ring being slotted in its outer wall to provide an air openingto the outer zone of the fire pot and being spaced from said body member So as to forma passage for the products of combustion betweenthe air a body member including a suitable fire pot and a smoke outlet; means forming a fuel? chamber provided with a fuel door, said 7 chamber being formed with a lower flange; members supported by and below said flange and forming an ,air ring'beneaththe latter, said flangebeing slotted to provide an upper air opening to the sp'ace inclosed by V 3 said ring; means forming afresh air chamber above the ring between thejatmosphere and said a1r opening, sa-idairring being slotted to form. air openings-in its lower portion, and being spaced from said f body member sou-as to; form a passage for the" products of combust on between thermg and body member and in the outer zone of the fire pot, said' passage communicating-with,

and disposed intermediatelyof, said fire'pot and said smoke outlet,-andsaid air ring slots A heating stove comprising member including a suitable fire pot and a smoke outlet, a fuel feeding element secured to the front-of thestove provided with a fuel door, an air ring fixedly secured to the lower end of said fuel feeding'element, V fresh air chamber formed withln'the body' member aboye' said ring and communicatlng wlth the top of the r ng, said r ng bea 7 body ing slotted in its outer walla-andadapted]V to discharge the fresh air-radialiy into' the y outer zone of the fire pot between the air ring and vsaid body 1 member for the pur pose set forth. 7 I V a V ,"Signed me, this 23rd day of July, 1917, 

